Operating Segments (Tables)

6 Months Ended

Jun. 30, 2024

Segment Reporting [Abstract]

Schedule of Segment Reporting Information

Segment Reporting for the Quarter Ended June 30, 2024

	Treatment			Services			Segments Total			Corporate (1)			Consolidated Total
Revenue from external customers	$	8,343		$	5,643		$	13,986		$	—		$	13,986
Intercompany revenues		9			13			22			—			—
Gross loss		(1,197	)		(109	)		(1,306	)		—			(1,306	)
Research and development		186			24			210			63			273
Interest income		—			—			—			213			213
Interest expense		(33	)		(2	)		(35	)		(74	)		(109	)
Interest expense-financing fees		—			—			—			(16	)		(16	)
Depreciation and amortization		367			44			411			19			430
Segment loss		(1,668	)		(462	)		(2,130	)		(1,655	)		(3,785	)
Expenditures for segment assets		457			140			597			—			597	(2)

Segment Reporting for the Six Months Ended June 30, 2024

	Treatment			Services			Segments Total			Corporate (1)			Consolidated Total
Revenue from external customers	$	17,052		$	10,551		$	27,603		$	—		$	27,603
Intercompany revenues		54			29			83			—			—
Gross loss		(1,249	)		(677	)		(1,926	)		—			(1,926	)
Research and development		404			52			456			113			569
Interest income		—			—			—			387			387
Interest expense		(69	)		(2	)		(71	)		(154	)		(225	)
Interest expense-financing fees		—			—			—			(29	)		(29	)
Depreciation and amortization		733			89			822			40			862
Segment loss		(2,514	)		(1,419	)		(3,933	)		(3,310	)		(7,243	)
Expenditures for segment assets		617			224			841			—			841	(2)

Segment Reporting for the Quarter Ended June 30, 2023

	Treatment			Services		Segments Total			Corporate (1)			Consolidated Total
Revenue from external customers	$	12,834		$	12,198	$	25,032		$	—		$	25,032
Intercompany revenues		26			17		43			—			—
Gross profit		2,491			2,025		4,516			—			4,516
Research and development		91			7		98			23			121
Interest income		—			—		—			172			172
Interest expense		(23	)		—		(23	)		(24	)		(47	)
Interest expense-financing fees		—			—		—			(24	)		(24	)
Depreciation and amortization		589			89		678			14			692
Segment income (loss)		1,273			840		2,113			(1,594	)		519
Expenditures for segment assets		293			5		298			—			298	(3)

Segment Reporting for the Six Months Ended June 30, 2023

	Treatment			Services			Segments Total			Corporate (1)			Consolidated Total
Revenue from external customers	$	22,428		$	22,711		$	45,139		$	—		$	45,139
Intercompany revenues		230			36			266			—			—
Gross profit		3,743			3,782			7,525			—			7,525
Research and development		158			10			168			52			220
Interest income		—			—			—			298			298
Interest expense		(45	)		(1	)		(46	)		(54	)		(100	)
Interest expense-financing fees		—			—			—			(44	)		(44	)
Depreciation and amortization		1,162			249			1,411			28			1,439
Segment income (loss)		1,605			1,813			3,418			(3,216	)		202
Expenditures for segment assets		1,043			4			1,047			—			1,047	(3)

(1)	Amounts reflect the activity for corporate headquarters not included in the segment information.
(2)	Net of financed amount of $0 and $44,000 for the three and six months ended June 30, 2024, respectively.
(3)	Net of financed amount of $107,000 and $157,000 for the three and six months ended June 30, 2023, respectively.